Scale.



No. 824,749. PATENTED JULY 3, 1906.

H. SHOCK.

SCALE.

APPLICATION FILED JAN. 31. 1906.

2 SHEETS-SHBET 1.

1m: NORRIS FETER! co., WASHINGTON, o. c.

PATENT-ED JULY 3, 1906.

A. H. SHOCK.

- SCALE.

APPLICATION FILED JAN. 31. 1900.

2 SHEETS-SHEET 2., I

UNITED STATES PATENT OFFICE.

ABRAHAM H. SHOCK, OF LANCASTER, PENNSYLVANIA, ASSIGNOR TO H. O. B. KENDIG, OF LANCASTER, PENNSYLVANIA.

SCALE,

Specification of Letters Patent.

Fatented July 3, 1906.

Application filed Jan ary 31,1906. Serial No. 298,839.

and useful Improvements in Scales; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to platform-scales, and more especially to bearing-pendants therefor; and it consists in the construction and combination of parts hereinafter more particularly set forth and claimed.

In the accompanying drawings, Figure 1 represents a plan view of a scale-frame with certain of the parts removed, illustrating the arrangement of my weighing-levers. Fig. 2 is a transverse sectional view through the base of the frame. Fig. 3 is a perspective view of the frame which supports the weighingslab. Fig. 4 is a detail perspective view of one of the pendant-blocks. Fig. 5 is a bottom plan view of one of said blocks. Fig. 6 is a detail perspective view of one of the pendant-links and its supporting-block. Fig. 7 is an elevation of one of said links with one of said blocks in section, and Fig. 8 is a detail perspective view of a pendant-link hereinafter described.

A designates the depressible platform-slab, having sockets a in its under side to receive studs I), raised on the mainbars B of its rectangular supporting-frame. These bars are connected by rods 0, all parts of said frame being rigid. The ends of these rods are preferably passed through holes I) in the ends of the said bars and headed; but the means of attachment of these parts, as well as those for holding said slab on the platform-scale, are not essential.

Each bar B consists, preferably, of a single casting and has at each end a downwardlyeXtending limb B, terminating in an outwardly-bent foot B which is recessed to leave two parallel terminal lugs b approximately of disk form, each of which receives centrally and holds a transverse pintle cl. On each of these an upwardly-extending metallic loop, pendant, or bearing-link E, having a broad keyhole-opening E, is pivoted at the middle of its lower end, its square upper end being provided with a knife-edge 0. This knife-edge fits in a V-shaped groove f in the upper face of a bearing-blockf. This groove is also extended down the sides of the said block and adapted to loosely receive the sides of said loop or link. The bottom of said block has a larger V-shaped groove or recess F formed therein, which fits an upwardlypresented knife-edge of a lug 9, formed on one of the Weighing-levers G and H. These levers are of any usual form and connected together by a hearing link or pendant I, having at the ends of its opening knife-edges i and j, fitting in V-shaped grooves 7c of bearing-blocks K, similar to the blocks aforesaid. The inner faces of said blocks are provided with broader grooves K, which receive the knife-edges of lateral lugs L and-M on said levers G and H, respectively. These levers are pivoted at their supported ends, as usual, on pendants from the base Z. These consist of bearing-links N, similar to those marked E, but reversed in position, so that the knifeedge u is presented upwardly, entering V- shaped groove 0 of a bearing-block O, the larger inner V-shaped groove O of which receives the downwardly-presented knife-edge of pivot-lug P on said lever. The upper end of said link, loop, or pendant N is provided with a hole n to receive a pintle q, passed through lugs r of the under side of a vertically-adjustable block R, which is screwtapped on its upper side at r to receive an adjusting-screw S, passed down through a part of the base. A removable plate T is held by a screw t down on the head of this adjusting-screw S to prevent the latter from accidentally turning under any jar of the machinery, Hanging the platform on knifeedges and double joints has long been common, also the use of blocks having V-shaped recesses to fit knife-edges of loop-form pendants. There is often great difficulty in making the fit at the pivotal points perfect. The platform-frames have therefore often been made of more or less flexible metal, permitting the bars to be so bent and shaped as to permit such exactness, which is very important to the responsiveness of the scale and the accuracy of its indications. The adjustability of the pendants for the levers above explained attains this result without requiring any bending or other special treatment of any part of the mechanism. Consequently I am able to use a rigid platform-frame, securing greater strength. The bearing-links or pendants at the corners of said castings are quite uninclosed and readily accessible, no housings or casings being employed.

Integral with the base is a flat-faced lug or boss Y, adapted to fit one of the flat sides of the block R and prevent the same from turning while said block is being adjusted vertically by means of the screw S aforesaid. The hole or eyelet n and the pintle passing through the same prevent the pendant from slipping around out of proper position, as often happens when such pendants are hung loosely by a hook or link engaging with the inner surface of the pendant and passing through its main opening. To reduce friction, the bearing-block within each pendant N has downwardly-tapered sides, which consequently are in contact with the vertical side bars of the pendant at hardlymore than a single point on each side. By casting the said pendant in the form of a rectangular frame having a central opening and an independent eyelet at the top or bottom I secure the permanent accuracy of its shape and its position. A wire stirrup or loop is liable to be bent out of shape. Such a loop may also slip around out of position, while a stirrup in the form of the letter U must be fastened at two points instead of one. My long loop I, as shown in Fig. 8, has its central loop enlarged laterally at its middle to permit the convenient withdrawal of the bearing-blocks as desired. It needs no eyelets, the pressure of such blocks in both its ends preventing any slipping. The openings of links E and N are enlarged laterally at one end to permit similarly the Withdrawal of the bearingblocks. This gives them approximately the form of a broad keyhole.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a platform-scale, a pendant or bearing link consisting of a rectangular rigid frame having a hole or eyelet independent of its central opening, said pendant forming part of the support of a platform and being provided with an inwardly-presented knifeedge, in combination with a pintle entering said eyelet to support said pendant and prevent thelatter from slipping out of position a bearing-block which has a V-shaped groove fitting said knife-edge and another V-shaped groove in its opposite face, a part of the mechanism provided with a lug having a knifeedge-that fits in the latter groove and another part of the scale connected to the other end of the said link or pendant substantially as set forth.

2. In combination with a bearing-pendant for a platform-scale, having a vertically-presented horizontal. knife-edge and an eyelet independent of its central opening, a bearing-block having a groove to fit said edge, a part entering said eyelet to prevent the said pendant from turning out of position, extensions of said groove down the sides of said block to receive the sides of said pendant and a V-shaped groove in its inner face and a part of the mechanism having a lug with a knife-edge received in the latter substantially as set forth.

3. In combination with a bearing-pendant for a platform-scale, and a weighing-lever having a lug, both of said parts being provided with opposed knife-edges, an intervening bearing-block having V-shaped grooves in its lower and upper faces to receive the said knife edges, the depressible platform and means connecting the said pendant thereto, the pendant provided with an eyelet by which it is suspended or supported from one relatively fixed point preventing the pendant from slipping out of place.

4. In combination with a platform-scale bearing pendant or link, a weighing-lever pivoted therein, a depressible platform bearing on said lever, a bracket or block pivotally connected to said pendant and a screw distinct from said bracket working through a fixed part and engaging the said bracket or block to vertically adjust the same and the gaid pendant and lever substantially as set 01th.

5. In combination with a platform-scale bearing pendant or link, a weighing-lever pivoted therein, a depressible platform bearing on said lever, a supporting-bracket pivotally connected to said pendant, a screw distinct from said bracket working through a fixed part and engaging the said bracket or block to vertically adjust the same and a device held in contact with the said screw to prevent its accidental loosening.

6. In combination with a platform-scale bearing pendant or link, a weighing-lever pivoted therein, a depressible platform partly supported by the said lever, a bearing-block provided with two V-shaped grooves in opposite faces to receive knife-edges of said link and lever, a bracket pivotally connected to said. pendant for supporting'the same and a screw distinct from said bracket engaging the same for adjusting the same substantially as set forth.

7. In combination with a depressible platform and a pair of weighing-levers on which it bears and which are provided with lateral lugs having lmife-edges presented respectively upward and downward, a bearing-link having inwardly-presented knife-edges at both ends consisting of a rectangular frame having near its middle a lateral enlargement of its central opening and a pair of bearingblocks, each of which has a pairof V-shaped grooves in opposite faces, one groove of each block receiving the knife-edge of one end of the said link and the other groove of each block receiving the knife-edge of one of the said levers substantially as set forth.

8. In a platform-scale, a pendant or bearing link forming part of the support of a platform and consisting of a frame having a central opening and provided with an eyelet at its top to prevent it from slipping out of proper position, in combination with a device entering said eyelet to suspend said pendant, a bearing-block resting in said pendant and mechanism provided with a knife-edge resting on said bearing-block, the said pendant being provided at the bottom f with an upwardly and inwardly presented knife-edge and the said block having trans- I versely-arranged V shaped grooves in its upper and lower faces respectively to receive said knife-edges substantially as set forth.

9. In a platform-scale, a pendant having two vertical sides in combination with a bearing-block fitting in said pendant and tapering downward at the sides to reduce the area in frictional contact with said sides of the pendant, mechanism bearing on said block and means for suspending said pendant from a single fixed point, said means and pendant eing adapted to prevent said pendant from slipping past said substantially as set forth.

In testimony whereof I have name to this specification in the two subscribing witnesses.

ABRAHAM H. SHOCK.

signed my presence of Witnesses:

E. H. BURKHoB, A. E. BURKHOLDER.

point and out of position 

